<script setup lang='ts'>
import type { Ref ,watch} from 'vue'
import { computed, onMounted, onUnmounted, ref ,reactive,defineAsyncComponent} from 'vue'
import { useRoute } from 'vue-router'
import { useRouter } from 'vue-router'
import { storeToRefs } from 'pinia'
import { NAutoComplete, NButton, NInput, useDialog, useMessage,NSelect,NPopover } from 'naive-ui'
import { Message } from './components'
import { useScroll } from './hooks/useScroll'
import { useChat } from './hooks/useChat'
import { useUsingContext } from './hooks/useUsingContext'
import HeaderComponent from './components/Header/index.vue'
import { HoverButton, SvgIcon } from '@/components/common'
import { useBasicLayout } from '@/hooks/useBasicLayout'
import { useApiChatStore, usePromptStore } from '@/store'
import { fetchApiChatProcess } from '@/api'
import { requestCheckContent } from '@/api/filter'
import { t } from '@/locales'
import { delCookie } from '@/utils/setCookie'
import {serviceTypeOptions} from '@/api/ServiceTypeConstant'
import { useApiSettingStore } from '@/store'


const settingStore = useApiSettingStore()

let controller = new AbortController()

const openLongReply = import.meta.env.VITE_GLOB_OPEN_LONG_REPLY === 'true'

const route = useRoute()
const router = useRouter()

const dialog = useDialog()
const ms = useMessage()

const chatStore = useApiChatStore()

const { isMobile } = useBasicLayout()
const { addChat, updateChat, updateChatSome, getChatByUuidAndIndex } = useChat()
const { scrollRef, scrollToBottom, scrollToBottomIfAtBottom } = useScroll()
const { usingContext, toggleUsingContext } = useUsingContext()

const { uuid } = route.params as { uuid: string }

const dataSources = computed(() => chatStore.getChatByUuid(uuid))
const conversationList = computed(() => dataSources.value.filter(item => (!item.inversion && !!item.conversationOptions)))

const prompt = ref<string>('')
const loading = ref<boolean>(false)

const inputRef = ref<Ref | null>(null)

// 添加PromptStore
const promptStore = usePromptStore()

// 使用storeToRefs，保证store修改后，联想部分能够重新渲染
const { promptList: promptTemplate } = storeToRefs<any>(promptStore)

// 未知原因刷新页面，loading 状态不会重置，手动重置
dataSources.value.forEach((item, index) => {
  if (item.loading)
    updateChatSome(uuid, index, { loading: false })
})
function handleSubmit() {
  onConversation()
}

async function onConversation() {
  let message = prompt.value
  await requestCheckContent(message) // 敏感词校验
  if (loading.value)
    return
  if (!message || message.trim() === '')
    return

  controller = new AbortController()
  addChat(
    uuid,
    {
      dateTime: new Date().toLocaleString(),
      text: message,
      inversion: true,
      error: false,
      conversationOptions: null,
      requestOptions: { prompt: message, options: null },
    },
  )
  scrollToBottom()

  loading.value = true
  prompt.value = ''

  let options: Chat.ConversationRequest = {}
  const lastContext = conversationList.value[conversationList.value.length - 1]?.conversationOptions

  if (lastContext && usingContext.value)
    options = { ...lastContext }

  // 添加用户回话信息
  addChat(
    uuid,
    {
      dateTime: new Date().toLocaleString(),
      text: '',
      loading: true,
      inversion: false,
      error: false,
      conversationOptions: null,
      requestOptions: { prompt: message, options: { ...options } },
    },
  )
		// 滚动屏幕到最低端
  scrollToBottom()

  try {
    let lastText = ''
    const fetchChatAPIOnce = async () => {
      await fetchApiChatProcess<Chat.ConversationResponse>({
				model:serviceType.value,
        conversationId:uuid,
        prompt: message,
        options,
        signal: controller.signal,
				token:settingStore.$state.token,
        proxyUrl:	settingStore.$state.proxyUrl,
        onDownloadProgress: ({ event }) => {
          const xhr = event.target
          const { responseText } = xhr
          // Always process the final line
          // const lastIndex = responseText.lastIndexOf('\n', responseText.length - 2)
					// console.log(responseText)
          let chunk = responseText
          // if (lastIndex !== -1)
          //   chunk = responseText.substring(lastIndex)
          try {
            const data = chunk
						updateChat(
              uuid,
              dataSources.value.length - 1,
              {
                dateTime: new Date().toLocaleString(),
                text: lastText + (data ?? ''),
                inversion: false,
                error: false,
                loading: true,
                conversationOptions: { conversationId: '', parentMessageId: '' },
                requestOptions: { prompt: message, options: { ...options } },
              },
            )

            if (openLongReply && data.detail.choices[0].finish_reason === 'length') {
              options.parentMessageId = data.id
              lastText = data.text
              message = ''
              return fetchChatAPIOnce()
            }

            scrollToBottomIfAtBottom()
          }
          catch (error) {
						console.log(error)
          }
        },
      })
      updateChatSome(uuid, dataSources.value.length - 1, { loading: false })
    }

    await fetchChatAPIOnce()
  }
  catch (error: any) {
    const errorMessage = error?.message ?? t('common.wrong')

    if (error.message === 'canceled') {
      updateChatSome(
        uuid,
        dataSources.value.length - 1,
        {
          loading: false,
        },
      )
      scrollToBottomIfAtBottom()
      return
    }

    const currentChat = getChatByUuidAndIndex(uuid, dataSources.value.length - 1)

    if (currentChat?.text && currentChat.text !== '') {
      updateChatSome(
        uuid,
        dataSources.value.length - 1,
        {
          text: `${currentChat.text}\n[${errorMessage}]`,
          error: false,
          loading: false,
        },
      )
      return
    }

    updateChat(
      uuid,
      dataSources.value.length - 1,
      {
        dateTime: new Date().toLocaleString(),
        text: errorMessage,
        inversion: false,
        error: true,
        loading: false,
        conversationOptions: null,
        requestOptions: { prompt: message, options: { ...options } },
      },
    )
    scrollToBottomIfAtBottom()
  }
  finally {
    loading.value = false
  }
}

async function onRegenerate(index: number) {
  if (loading.value)
    return

  controller = new AbortController()

  const { requestOptions } = dataSources.value[index]

  let message = requestOptions?.prompt ?? ''

  let options: Chat.ConversationRequest = {}

  if (requestOptions.options)
    options = { ...requestOptions.options }

  loading.value = true

  updateChat(
    uuid,
    index,
    {
      dateTime: new Date().toLocaleString(),
      text: '',
      inversion: false,
      error: false,
      loading: true,
      conversationOptions: null,
      requestOptions: { prompt: message, options: { ...options } },
    },
  )

  try {
    let lastText = ''
    const fetchChatAPIOnce = async () => {
      await fetchApiChatProcess<Chat.ConversationResponse>({
				model:serviceType.value,
				conversationId:uuid,
        prompt: message,
        options,
        signal: controller.signal,
        token:settingStore.$state.token,
				proxyUrl:	settingStore.$state.proxyUrl,
        onDownloadProgress: ({ event }) => {
          const xhr = event.target
          const { responseText } = xhr
          // Always process the final line
          // const lastIndex = responseText.lastIndexOf('\n', responseText.length - 2)
          let chunk = responseText
          // if (lastIndex !== -1)
          //   chunk = responseText.substring(lastIndex)
          try {
            const data = chunk
            updateChat(
              uuid,
              index,
              {
                dateTime: new Date().toLocaleString(),
                text: lastText + (data ?? ''),
                inversion: false,
                error: false,
                loading: true,
                conversationOptions: { conversationId: data.conversationId, parentMessageId: data.id },
                requestOptions: { prompt: message, options: { ...options } },
              },
            )

            if (openLongReply && data.detail.choices[0].finish_reason === 'length') {
              options.parentMessageId = data.id
              lastText = data.text
              message = ''
              return fetchChatAPIOnce()
            }
          }
          catch (error) {
            //
          }
        },
      })
      updateChatSome(uuid, index, { loading: false })
    }
    await fetchChatAPIOnce()
  }
  catch (error: any) {
    if (error.message === 'canceled') {
      updateChatSome(
        uuid,
        index,
        {
          loading: false,
        },
      )
      return
    }

    const errorMessage = error?.message ?? t('common.wrong')

    updateChat(
      uuid,
      index,
      {
        dateTime: new Date().toLocaleString(),
        text: errorMessage,
        inversion: false,
        error: true,
        loading: false,
        conversationOptions: null,
        requestOptions: { prompt: message, options: { ...options } },
      },
    )
  }
  finally {
    loading.value = false
  }
}

function handleDelete(index: number) {
  if (loading.value)
    return

  dialog.warning({
    title: t('chat.deleteMessage'),
    content: t('chat.deleteMessageConfirm'),
    positiveText: t('common.yes'),
    negativeText: t('common.no'),
    onPositiveClick: () => {
      chatStore.deleteChatByUuid(uuid, index)
    },
  })
}

function handleClear() {
  if (loading.value)
    return

  dialog.warning({
    title: t('chat.clearChat'),
    content: t('chat.clearChatConfirm'),
    positiveText: t('common.yes'),
    negativeText: t('common.no'),
    onPositiveClick: () => {
      chatStore.clearChatByUuid(uuid)
    },
  })
}

function handleEnter(event: KeyboardEvent) {
  if (!isMobile.value) {
    if (event.key === 'Enter' && !event.shiftKey) {
      event.preventDefault()
      handleSubmit()
    }
  }
  else {
    if (event.key === 'Enter' && event.ctrlKey) {
      event.preventDefault()
      handleSubmit()
    }
  }
}

function handleStop() {
  if (loading.value) {
    controller.abort()
    loading.value = false
  }
}

// 可优化部分
// 搜索选项计算，这里使用value作为索引项，所以当出现重复value时渲染异常(多项同时出现选中效果)
// 理想状态下其实应该是key作为索引项,但官方的renderOption会出现问题，所以就需要value反renderLabel实现
const searchOptions = computed(() => {
  // if (prompt.value.startsWith('/')) {
  //   return promptTemplate.value.filter((item: { key: string }) => item.key.toLowerCase().includes(prompt.value.substring(1).toLowerCase())).map((obj: { value: any }) => {
  //     return {
  //       label: obj.value,
  //       value: obj.value,
  //     }
  //   })
  // }
  // else {
  //   return []
  // }
    return promptTemplate.value.filter((item: { key: string }) => item.key.toLowerCase().includes(prompt.value.substring(1).toLowerCase())).map((obj: { value: any }) => {
        return {
            label: obj.value,
            value: obj.value,
        }
    })
})

// value反渲染key
const renderOption = (option: { label: string }) => {
  for (const i of promptTemplate.value) {
    if (i.value === option.label)
      return [i.key]
  }
  return []
}

const placeholder = computed(() => {
  if (isMobile.value)
    return t('chat.placeholderMobile')
  return t('chat.placeholder')
})

const buttonDisabled = computed(() => {
  return loading.value || !prompt.value || prompt.value.trim() === ''
})


const footerClass = computed(() => {
  let classes = ['p-4']
  if (isMobile.value)
    classes = ['sticky', 'left-0', 'bottom-5', 'right-0', 'p-2', 'pr-3', 'overflow-hidden']
  return classes
})

onMounted(() => {
  scrollToBottom()
  if (inputRef.value && !isMobile.value)
    inputRef.value?.focus()
})

onUnmounted(() => {
  if (loading.value)
    controller.abort()
})

const serviceType = ref("gpt-3.5-turbo")
</script>

<template>
  <div class="flex flex-col w-full h-full">
    <HeaderComponent
      v-if="isMobile"
      :using-context="usingContext"
      @export="handleExport"
      @toggle-using-context="toggleUsingContext"
    />
    <main class="flex-1 overflow-hidden">
      <div id="scrollRef" ref="scrollRef" class="h-full overflow-hidden overflow-y-auto">
				<div  v-if="false" style="width: 100%;" class="flex items-center justify-center mt-4 text-center text-neutral-300">
					<div style="width: 100%;" class="flex items-center justify-center ml-4">
						<span class="dark:text-white" ><b>模型</b></span>
						<NSelect
							style="width: 140px" class=" dark:text-white"
							v-model:value="serviceType"
							:key="serviceType"
							:options="serviceTypeOptions"
						/>
					</div>
				</div>
				<div
          id="image-wrapper"
          class="w-full max-w-screen-xl m-auto dark:bg-[#101014]"
          :class="[isMobile ? 'p-2' : 'p-4']"
        >
<!--					<div style="position: fixed; width: 60%;height: 20px">-->
          <template v-if="dataSources.length">
            <div>
              <Message
                v-for="(item, index) of dataSources"
                :key="index"
                :date-time="item.dateTime"
                :text="item.text"
                :inversion="item.inversion"
                :error="item.error"
                :loading="item.loading"
                @regenerate="onRegenerate(index)"
                @delete="handleDelete(index)"
              />
              <div class="sticky bottom-0 left-0 flex justify-center">
                <NButton v-if="loading" type="warning" @click="handleStop">
                  <template #icon>
                    <SvgIcon icon="ri:stop-circle-line" />
                  </template>
                  Stop Responding
                </NButton>
              </div>
            </div>
          </template>
        </div>
      </div>
    </main>
    <footer :class="footerClass">
      <div class="w-full max-w-screen-xl m-auto">

<!--				<n-popover trigger="hover">-->
<!--					<template #trigger>-->
<!--						<HoverButton @click="handleClear">-->
<!--            -->
<!--						</HoverButton>-->
<!--						<span class="dark:text-white" ><b></b></span>-->
<!--					</template>-->

<!--				</n-popover>-->
				<NSelect
					v-if="isMobile"
					style="width: 175px"
					v-model:value="serviceType"
					:key="serviceType"
					:options="serviceTypeOptions"
				/>

        <div class="flex items-center justify-between space-x-2">
					<NSelect
						v-if="!isMobile"
						style="width: 220px"
						v-model:value="serviceType"
						:key="serviceType"
						:options="serviceTypeOptions"
					/>
          <HoverButton @click="handleClear">
            <span class="text-xl text-[#4f555e] dark:text-white">
              <SvgIcon icon="ri:delete-bin-line" />
            </span>
          </HoverButton>

<!--					是否带上聊天记录-->
<!--          <HoverButton v-if="!isMobile" @click="toggleUsingContext">-->
<!--            <span class="text-xl" :class="{ 'text-[#4b9e5f]': usingContext, 'text-[#a8071a]': !usingContext }">-->
<!--              <SvgIcon icon="ri:chat-history-line" />-->
<!--            </span>-->
<!--          </HoverButton>-->

          <NAutoComplete v-model:value="prompt" :options="searchOptions" :render-label="renderOption">
            <template #default="{ handleInput, handleBlur, handleFocus }">
              <NInput
                ref="inputRef"
                v-model:value="prompt"
                type="textarea"
                :placeholder="placeholder"
                :autosize="{ minRows: 1, maxRows: isMobile ? 4 : 8 }"
                @input="handleInput"
                @focus="handleFocus"
                @blur="handleBlur"
                @keypress="handleEnter"
              />
            </template>
          </NAutoComplete>
          <NButton type="primary" :disabled="buttonDisabled" @click="handleSubmit">
            <template #icon>
              <span class="dark:text-black">
                <SvgIcon icon="ri:send-plane-fill" />
              </span>
            </template>
          </NButton>
        </div>
      </div>
    </footer>
  </div>
</template>
